Steel-band brake-shoe.



A. P. WORTHINGTON & W. C. SCHRODER.

STEEL BAND BRAKESHOE. APPLICATION FILED Nov. 24. 1915 Patented June 6, 1916.

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UNITED STATES V ALBERT WOB-THI NGTON AND WILLIAM CHARLES S CHRODEB, OF LOS AITGELES, CALIFORNIA;'SAID SCHRODER ASSIGNOB TO SAID WORTEINGTON.

. STEEL-BAND BRAKE-SHOE.

. Application filed November 24, 1915. Serial No. 63,312.

To all whom it may concern:

Be it known that we, ALBERT P. WORTH- moron and WILLIAM CHARLES SCHRODER,

Our invention relates to new and useful improvements in -internal expanding brakes for automobiles and in particular to the construction of the brake shoe.

It is an object of this invention to deslgn a brake shoe which is superior to those'generally used, simple in construction, positive in operation, and not liable to breakage or getting out of order.

We have designed the brake sh'oe particularly for the Ford automobile, though it will be understood that our invention 1s not hm-' ited thereto and is of general application.

With these and other objects in view which will appear as the description proceeds, our invention consists in the construction and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, which form a part of this specification: Figure 1 is a side elevation of the brake shoe and the brake drum in which it is mounted. Fig. 2 is a front View of the brake shoe. Fig. 3 is a sectional view taken on line 33 of Fig. 1.

Fig. 4 is a detail View on a large .scale, hereinafter to be referred to.

10 designates the brake drum in which the brake shoe 11 is mounted. The latter is made of steel and consists of a slotted ring provided with an outer lining 12 of thermoid suitably secured to the shoe by means of rivets 13.

14 designates an attaching bracket riveted to the inner face of the shoe, forming an aperture 15. A bolt 16 passes through said aperture and secures the shoe to the brake drum 10. The shoe issplit or slotted at a point diametrically opposed to the bolt 16. A pair of horizontal cam shaft engaging plates 17 17 extend inwardly from, the split ends of the shoe. A horizontal brakecam shaft 18 is positioned between said plates in operative engagement therewith and is operated by a cam shaft lever 19. The cam shaft plates 17 are secured by vertical members 20 which at their outer ends are provided with Specification of Letters Patent.

Patented June 6, 1916.

lugs 20' fastenedto the shoe by means of rivets 21. The vertical members 20 are providedwith a pair of'ofi-standing apertured ears 22 near their outer ends, said ears being formed by punching out a portion of the metal of said vertical members, as clearly shown in Figs. land 3; A helical spring 23, whose outer ends-are connected to the apertured ears '22, tends to draw the plates 17 towardeach other and in engagement with the cam shaft 18, normally holding the pcriphery of the shoe from'the inner'face of the brake drum, as will be understood.

The outer ends of the cam plates 17 are rigidly secured to the ends of the shoe as follows: A horizontal slot 24 is cut through vthe ends of the shoe and the outer ends of the cam plates 17 are reduced, forming shoulders 25 which abut against the inner face of the ring, while the reduced ends 26, which are of a size and shape .to fit the slots .24, are upset, as clearly shown in Fig. 4:.

Our improved steel brake shoe is superior to the ordinary castiron brake shoe in use in automobiles such as the Ford in having a separate bracket 14 by means of which it is secured to the brake drum. This is a point of weakness of the ordinary brake shoe, which is liable to fracture at this point. The attachment of the cam shaft engaging plates of our steel brake shoe is such as to provide an exceedingly solid construction not liable to get out of order.

Our brake shoe is also superior to the brake shoes whose body portion is made of two semicircular sections; The ends of the sections of such shoes remote from the cam shaft are held together by means of a helical spring. This spring is liable to become broken, causing the shoe sections to fall apart. By making the body portion of the shoe of steel and of one piece, as in our cam shaft engaging plates rigidly secured to the ends of said body portion and extending horizontally inwardly therefrom, a pair of vertical plate supporting members formed I bracket rigidly secured thereto, a pair of integral with said plates and riveted to said body portion, a pair of spaced apertured ears formed integral with said supporting members, and a coiled spring having its ends con- 5 nected to said ears and tending to pull said plates toward each other.

2. A brake shoe comprising a one piece body portion made of steel, a drum attaching bracket rigidly secured thereto, a pair of 10 cam shaft engaging plates rigidly secured to the ends of said body portion and extending inwardly therefrom, a pair of plate sup porting members formed integral with said plates and rigidly mounted on said body other.

Intestimony whereof "we have signed our 20 names to this specification.

ALBERT P. wonrnmeron. WILLIAM CHARLES scnnonnn. 

